222121201101012 has 36 divisors (see below), whose sum is σ = 561473495652160. Its totient is φ = 74040339768912.

The previous prime is 222121201101001. The next prime is 222121201101131. The reversal of 222121201101012 is 210101102121222.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 73100853 + ... + 76078755.

Almost surely, 2^{222121201101012} is an apocalyptic number.

It is an amenable number.

222121201101012 is an abundant number, since it is smaller than the sum of its proper divisors (339352294551148).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

222121201101012 is a wasteful number, since it uses less digits than its factorization.

222121201101012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5049852 (or 5049847 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 222121201101012 its reverse (210101102121222), we get a palindrome (432222303222234).

The spelling of 222121201101012 in words is "two hundred twenty-two trillion, one hundred twenty-one billion, two hundred one million, one hundred one thousand, twelve".